Melatonin works in small amounts: the two uses approved in the EU are 1 mg shortly before bedtime to reduce the time it takes to fall asleep, and 0.5 mg on the day of travel to ease the subjective feeling of jet lag. 'More is better' doesn't apply here – what matters is a small amount plus the right timing.
You're standing in front of the shelf or scrolling through the shop - and you see melatonin at 0.5 mg, 1 mg, 5 mg, sometimes even more. The logical question: how much actually makes sense? The short, clear answer: the two applications approved in the EU relate to small amounts - 1 mg shortly before bed for a shorter time to fall asleep, and 0.5 mg for less perceived jet lag. With melatonin, the rule is precisely not "more helps more"; what counts is a small amount plus the right timing. This guide shows why that is the case. It is general information and does not replace medical advice.
The key points at a glance
- Melatonin is a hormone the body produces itself, mainly in darkness.
- 1 mg shortly before bed: approved for shortening the time it takes to fall asleep.
- 0.5 mg on the day of travel: approved for easing the perceived effects of jet lag.
- With melatonin, the rule is not "more helps more" - the assessed amounts are small.
- The timing is just as important as the amount.
What melatonin does in the body
Melatonin is a messenger substance your body produces itself - mainly in the pineal gland in the brain. Its production follows the light: as it gets dark in the evening, the level rises; with the morning light, it falls again. In this way melatonin is firmly linked to your internal clock, the circadian rhythm, and signals to the body that the night is beginning.
Because the body produces this hormone in fine amounts anyway, a measured approach makes sense. As a supplement, melatonin is offered in precisely defined portions, so that the small amount can be dosed reliably - unlike a food that you portion by feel. More on the natural rhythm in sleeping better naturally.
The approved amounts at a glance
Unlike with many substances, melatonin has concrete, condition-bound EU statements. They are the best point of orientation, because they show which amounts have been officially assessed:
| Application | Amount | Timing |
|---|---|---|
| Shortening the time to fall asleep | 1 mg | shortly before bed |
| Easing the perceived effects of jet lag | 0.5 mg | on the day of travel shortly before bed, then on the following days |
Both figures make it clear: this is not about large amounts, but about the right moment. How to use melatonin when travelling is described in Jet lag and travel.
Why more is not automatically better
With some substances, the thought is natural that a larger amount brings a greater effect. With melatonin, this reverse conclusion is not appropriate. The approved statements refer explicitly to small amounts of 0.5 to 1 mg. Since melatonin only supports a signal the body itself produces in finely measured amounts anyway, it makes sense to orient yourself to this natural order of magnitude - rather than reaching for the highest number on the pack.
The idea that "more is better" often leads astray with supplements in general; this is also shown in Can you take too many vitamins?. With melatonin, the wisest approach remains: choose a proven small amount and observe how you get on with it. More on timing in Melatonin: effect & dosage.
The small amounts compared to everyday life
0.5 to 1 mg - that sounds abstract, but it is tiny. For comparison: one milligram is a thousandth of a gram. While many vitamin or mineral preparations lie in the range of tens or hundreds of milligrams, melatonin deliberately sits at the lower end of the scale. This is no coincidence but reflects the fact that the body itself releases this hormone only in very fine amounts. A supplement that orients itself to this natural order of magnitude works with the body rather than against it. That is precisely why preparations with very high melatonin amounts should be viewed with scepticism: they exceed the order of magnitude to which the approved statements and the body's own production relate, without offering any proven added value for it. The general principle "more is not automatically better" is also examined in Common mistakes with supplements.
Why the timing is so important
One aspect is easily overlooked in the question of amount: the timing. Both approved statements are explicitly tied to taking it "shortly before bed." This makes sense, because melatonin is linked to the signal "the night is beginning now." Taken at the right time, it fits into the natural course of things; too early in the evening, it fits less well. The best amount is of little use if the timing is wrong - with melatonin, amount and timing always belong together. General considerations on this in Intake rhythm: morning or evening.
Dosage forms: how to dose the small amount
So that 0.5 to 1 mg can be dosed reliably, the form is decisive:
- Drops: fine, individual gradation - ideal if you want to set the portion precisely.
- Tablets/capsules: a fixed portion with no counting, practical for a set evening routine.
- Sprays: quick and handy for on the go.
When comparing, pay less attention to the bare number and more to whether the portion matches the known amounts and the timing is kept. Which form suits you in general is explained by Capsule, tablet, powder or drops. If you're weighing up melatonin against a plant, Melatonin vs. valerian helps.
Why sensitivity is individual
One reason why small amounts suit melatonin so well: people react with differing sensitivity. Some get on perfectly well with 1 mg, others notice an effect at just a fraction of that. That is precisely why the smallest sensible amount that you get on well with is the wiser choice than the reflexive reach for the highest number. Factors such as age, daylight exposure and your own rhythm all play a part. Anyone who wants to know in general how to adapt amounts to their own situation will find guidance in Adjusting dosage to body weight - even though with melatonin it is not body mass but the rhythm that is at the fore.
Melatonin in special situations
There are phases of life in which the question of amount is secondary, because fundamental caution comes first. During pregnancy and breastfeeding, in children, with pre-existing conditions and when taking medication at the same time, the use of melatonin belongs in a conversation with a doctor - regardless of the size of the portion. Anyone wanting to combine several sleep-related preparations should also clarify this; basic rules on this in Supplements & medication. And because melatonin can make you tired, the rule is: after taking it, no longer drive a car or operate machinery.
Common misunderstandings about the amount
A widespread error: that a higher portion inevitably makes for a calmer night. In fact, the assessed statements refer to small amounts - orienting yourself to 0.5 to 1 mg is more sensible than reaching "upwards." The second error concerns the timing: taken too early, melatonin fits less well into the natural course of things. And the dosage form sometimes causes confusion - whether drops, capsule or spray is secondary; what is decisive is the right amount at the right time. Whether you supplement as a course or on a lasting basis is a question of its own - see Is melatonin addictive?
What research investigates about the amounts
Melatonin is one of the best-studied substances in the context of sleep, and that is precisely why the two approved EU statements with their concrete amounts exist. Science looks, among other things, at how different amounts and intake times interact with the circadian rhythm and how a shifted rhythm - for example with shift work or crossing time zones - can be re-aligned. It is notable that the officially assessed statements concentrate on small amounts and not on an "ever more." Honestly framed, this means: we reflect this direction without deriving from it any promise of effect, and the final medical assessment - especially regarding longer-term or higher-dose use - remains reserved for professionals.
Honestly framed & when medical advice makes sense
What is certain: the officially assessed melatonin amounts are small (0.5-1 mg) and tied to a timing. "More helps more" does not apply here. At the same time, sleep is a sensitive topic. Almost everyone knows the occasional restless night, but persistent sleep problems belong in medical hands - as does use with pre-existing conditions, when taking medication, and during pregnancy and breastfeeding. Supplements replace neither a healthy lifestyle nor medical treatment.
Suitable products & further guides
In the Melatonin category you'll find drops, capsules and sprays with clearly defined portion sizes. Continue holistically with Sleep & inner calm and Valerian. Read on: Melatonin: effect & dosage, Jet lag & travel, Melatonin vs. valerian, sleeping better naturally and Can you take too many vitamins?
Frequently asked questions (FAQ)
How much melatonin makes sense?
The approved applications rely on small amounts: 1 mg shortly before bed for a shorter time to fall asleep, 0.5 mg for less perceived jet lag. You should orient yourself to these orders of magnitude - with melatonin, "more helps more" does not apply.
Is more melatonin more effective?
No. The officially assessed statements refer explicitly to small amounts of 0.5 to 1 mg. Since melatonin only supports a signal the body produces in finely measured amounts anyway, a higher amount is not automatically better.
When should I take melatonin?
Shortly before bed - both approved statements are tied to precisely this timing. Taken too early in the evening, melatonin fits less well into the natural course of things. Amount and timing always belong together.
Which dosage form is easiest to dose?
Drops allow the finest gradation, tablets and capsules deliver a fixed portion with no counting, sprays are practical for on the go. What is decisive is not the form, but that the amount matches 0.5-1 mg and that you take it at the right time.
Health notice: This guide is for general information purposes only and does not replace individual medical or pharmaceutical advice. Food supplements are not a substitute for a balanced, varied diet and a healthy lifestyle. If you have health concerns, are pregnant or breastfeeding, or are taking medication, please consult a doctor or pharmacist. How our guides are created →
Sources
- Melatonin-Containing Food Supplements Should Not Be Taken Uncritically — German Federal Institute for Risk Assessment (BfR), 2024
- Melatonin for Falling Asleep: How Useful Are Products Like Sprays? — Verbraucherzentrale (German consumer advice centre)
- Melatonin: What You Need To Know — NIH / NCCIH (National Center for Complementary and Integrative Health)
- Melatonin: Facts, Extrapolations and Clinical Trials — Biomolecules (PMC/NIH, peer-reviewed review article), 2023
